simple black & white

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Old 09 September 2002   #1
simple black & white

In photoshop 5.5, how do I export a color picture black & white?
Old 09 September 2002   #2

Do it in a copy of the original before you accidentally hit "save" and loose the color version.

Beware: grayscale jpegs don't show up in internet browsers.

Old 09 September 2002   #3
You could also use image->adjust->desaturate. Since it's not really grayscale, wouldn't those show up in internet browers?
Old 09 September 2002   #4
yes offcourse, or convert it to grays and than back to rgb again
Old 09 September 2002   #5
Another method:

Convert to lab color
Select Lightness channel
Duplicate Lightness channel into a new document
Convert this document to grayscale

The difference is not big, but converting this way results in a somewhat better conversion to grayscale (especially with flesh tones).

Grayscale images do show up in the browser (at least in mine ), and they are smaller too. CMYK images certainly do not show up in the browser..
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Old 09 September 2002   #6
Another method, and one which allows you to do a lot of fine tuning, is to go to Image --> Adjust --> Channel Mixer and select the "monochrome" option. This way you can really spend hours balancing how the individual channels contribute to the final grayscale.
Old 09 September 2002   #7
My mistake

Quote: Originally posted by Marcel
Grayscale images do show up in the browser (at least in mine ), and they are smaller too. CMYK images certainly do not show up in the browser..
Old 09 September 2002   #8
My favorite method:

1) Add a Curves Adjustment Layer and leave it alone.
2) Add an HSB Ad-Layer and bring Sat all the way down.
3) Go back to Curves Ad-Layer and play with individual channels to manual adjust contrast.

Great trick. Works wonders for converting fleshtones to greyscale.
Old 09 September 2002   #9
Thanks guys. That helped out alot!
Old 01 January 2006   #10
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